Support for Pl3xMap web server

[jeremy-bloom]

Add support so MinecraftStats can use Pl3xMap web server: https://github.com/granny/Pl3xMap
https://modrinth.com/plugin/pl3xmap/versions

[pdinklag]

Note to self: this will require #256 to be resolved, because Pl3xMap has gzip compression of JSON files activated and it's hardcoded.

[GenOpenDiesel]

hey, when support eta?